I believe this is a bit of a trick question, while you are right about both B and D, they both preexist they just develop into other structures. I believe the correct answer is A since the nerve cord is hollow not solid.
Answer:
Digestive system resembles to the Mitochondria which is called as power house of cell.
Explanation:
The mitochondria function as digestive system by taking in nutrients and produces energy from them after catabolic process. Mitochondria takes in nutrient rich molecules, break them and produces energy rich molecules. Intestine in the digestive system perform the same function by extracting energy from the food to help body cells work.
<span>The geologic time scale is divided into periods, which are then divided into epochs, which are further divided into ages. For example, the time of the dinosaurs lasted 3 periods (Triassic, Jurassic, Cretaceous), each period had 3 epochs (late, early, middle), and each age fit into one of those. Many epochs have more than 1 age associated with them.
As for the basis for differentiating the eras, I'm not so sure. The only one I can say for sure is the end of the Cretaceous, which is when the dinosaurs suddenly became extinct due to a meteor impact. I think the divisions are based on significant, global-scale events that changed the world.
Sorry its so long but that the answer i think >:) ur welcome
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Answer:
Producers are bamboo trees, coconut trees, banana tree, shrubs , bromeliads e t.c.
The primary consumers are monkey, grasshopper, bats, macaws, butterflies, sloths.
Secondary consumers are iguanas, vampire bats, frogs.
Tertiary consumers are Jaguar and python.
Decomposers are insects, microorganisms.
Explanation:
Food webs refers to association that comprises of interconnections of several food chains or what organisms feed on or live on in an ecological community. Food web comprises of producers, primary consumer, secondary consumer , tertiary consumer and decomposers.